| Idar-Oberstein to Cloverly (Maryland) | 4,002.97 mi (6,442.16 km) |
| Idar-Oberstein to Clovis (California) | 5,639.30 mi (9,075.58 km) |
| Idar-Oberstein to Clovis (New Mexico) | 5,240.36 mi (8,433.54 km) |
| Idar-Oberstein to Clute (Texas) | 5,235.66 mi (8,425.99 km) |
| Idar-Oberstein to Coachella (California) | 5,716.22 mi (9,199.37 km) |
| Idar-Oberstein to Coalinga (California) | 5,698.29 mi (9,170.52 km) |
| Idar-Oberstein to Coamo (Puerto Rico) | 4,548.37 mi (7,319.89 km) |
| Idar-Oberstein to Coatesville (Pennsylvania) | 3,915.80 mi (6,301.86 km) |
| Idar-Oberstein to Cockeysville (Maryland) | 3,971.15 mi (6,390.94 km) |
| Idar-Oberstein to Cocoa (Florida) | 4,668.23 mi (7,512.79 km) |
| Idar-Oberstein to Cocoa Beach (Florida) | 4,664.71 mi (7,507.12 km) |
| Idar-Oberstein to Coconut Creek (Florida) | 4,747.54 mi (7,640.43 km) |
| Idar-Oberstein to Coeur d'Alene (Idaho) | 4,928.02 mi (7,930.89 km) |
| Idar-Oberstein to Cohoes (New York) | 3,709.90 mi (5,970.50 km) |
| Idar-Oberstein to Cold Springs (Nevada) | 5,478.90 mi (8,817.44 km) |
